Clamp



March 1,1927. 1,619,749

R. MURRAY CLAMP Filed Jan. 29, 1926- I INVENTOR z'olari Warm A'ITORNE zPatented Mar. 1, 1927.

UNITED STATES wane rss'r cr s s.

RICHARD MURRAY, NEVT YORK, N. 'Y

CLAMP.

Application filed January 29, 1926. serial no. 24,581.

jaw. members into predetermined spaced re-' lation and for retaining thesame in such position; a further object being to provide a clamp of theclass described. one part of which issu'bstantially T-shaped in form,one end of the crosshead of said part forming a j aw, and another jawdetachably and adjust ably mounted with relation to the shank of thefirst named part, and the other end of the crosshe'ad of the first namedpart having a lever pivotally and detachably' coupled therewith, andmeans interposed between the second jaw and said lever for moving andretaining the jaws of the clampin fixed relation; and with theseandother objects in view, the invention consists in a clamp of the classand for the purpose specified, which is simple in construction andoperation, and efiicient in use, and which is con structed ashereinafter described and claimed.

The invention is fully disclosed in the following specification, ofwhich the accompanying' drawing forms a part in which the separate partsof myimprovement are designated by suitable reference characters in eachof the views, and in which-.-

F ig. 1 is a side View of a clamp made according to my invention andshowing the same in operative position.

Fig. 2 is a-view similar to Fig. 1 but showing the several parts of theclamp in open position.

Fig. 3 is a section 'on the line 3'3 of Fig. 1; and,

Fig. a is a perspective detail view showing a slight modification.

My improved clamp as shown in the accompanying' drawing comprises twojaw parts 5 and 6f, the part 5 asshown in Figs.

. 1 and 2 of the drawing being in the form of a T-shaped membercomprising a crosshe'ad 7 to the central portion of whlch 1s fixed shank8 arranged at right angles to the cro'sshead and composed of separateparts 8 andS positionedat opposite sides or the crosshead 7. The part 8is provided at its free end with an aperture 9 opening outwardly throughthe end thereof, and one wall or said aperture is provided with aplurality of notches or recesses 10 adapted to receive a pin, bolt orrivet 11 secured to the central portion oi the jaw member 6 This pin orbolt also passes through an elongated aperture 12 formed in the part 8and in longitudinal alinenient with the aperture 9 and the notches orrecesses 10 therein. This aperture 12 may, if desired, be formed similarto the aperture The parts 8" and 8 are also preferably retained inspaced relation adjacent the apertures 9 and 12 by a block 3 securedtherebetween.

The ends or the jaw members 5 and 6 are preferably provided with widefaces formed by angle iron plates 13, secured thereto as seen in Figs.1, 2 and 3 of the drawing to provide a comparatively wide bearing racetherefor. In the use or the clamp, the crosshead 7 of the jaw member 5'is provided with an aperture 14 opening through one side edge thereofasclearly seen in Figs. 1 and 2 ofthe drawing, A lever 15, provided atits free end witha pin' 16, is pivotally mountedin connection with thecrosshead 7 by passing the pin 16 into the aperture 14, the shank of thepin 16 being fiattenedfto permit of its passage through the outlet ofsaid aperture and to key the lever 15 against displacement unless movedinto such position 1 as to permit the passage" of the pin through theoutlet as will be apparent.

The lever 15 is provided adjacent the pivot 16 with an elongatedaperture 17, one wall or which is provided with spaced notches 18 whichare positioned below the longitudinal central plane or the lever andbelow such plane extending through the a'linlr lever 19, the link arm orwhich is provided at its end with ascrew or bolt 20 adapted to passthrough the aperture 17 and operate in the notches or recesses 18thereof. A winged nut 21 is employed to retain the ilink lever 19against displacement from the lever 15. The short end of the link lever19 is provided with a spring keeper or catch 22 into which thelever 15is adapted to pass, and by means of which said lever is held againstdisplacement when the clamp is in operative position as seen in Fig. 1of the drawing.

In Fig. 4 of the drawing, I have shown a slight modification in whichthe shank part 8, consisting of the parts 8 and 8 are pivoted to thecrosshead 7 as seen at 23 in stead of being riveted or fixedly securedthereto as shown in Figs. 1 and 2 of the drawing. It will be understoodthat I am not necessarily limited to any specific manner of constructingthe separate parts of my improved clamp, nor to the proportionatedimensions thereof herein shown and described. I

In the drawing, I have shown for the purpose of illustrating one use ofmy invention, the side wall members 24 and 25 of a concrete mold or formsuch as em ployed in the construction of buildings or the walls ofbuildings. My improved clamp or a number of these clamps may be used onthat part of the mold or formed wall structure just above a concretebody 26, formed thereby for the purpose of retaining the walls'24 and 25in spaced rela- 7 tion, or for moving the same into proper position ifbulged. It will be apparent that in the use ofmy improved clamp, and inapplying the same to the walls 2% and 25, theparts will be moved intothe position shown in Fig. .2 of the drawing, after which the'lever 15is moved downwardly, which operation forces the link lever 19 laterallyand downwardly and swings the jaw 6 or the face thereof inwardly intoen-.

gagement with the wall 25. In the downward movement of the lever 15, itwillbe noted that the pivot pin 20 passes the dead center positionbetween the pivots formed by the pin 16, and the pivotal connection ofthe jaw 6'with the link lever 19, and the parts are retained inoperative position, the keeper 22 also aiding to retain the lever 15 inposition. i

It will also be understood that the pivot pins 11 and 20 may be adjustedinto any of the notches or recesses 1018 respectively, but when it isdesired to retain the jaws 5 and 6 in parallel relation, said pins areplaced in correspondingnotches as in the illustration given, both pinsbeing located in the second notch from the left. However, thisarrangement may be changed tosuit other conditions or uses of the clamp.

While I have shown certain details of construction for carrying myinvention into spirit of my invention or sacrificing its.

advantages.

Having fully described my invention, what I claim as new and desireto'secure by Letters Patent, is

1. A clamp of the class described comprising two jaw parts, a memberattached to one part and with which the other part is adjustablycoupled, and means involving a lever and link lever constructionindependent of said member and pivotally connected to the separate jawparts for moving said parts into predetermined position.

2. A clamp of the class described comprising two jaw parts, a memberattached to one part and with which the other part is adjustablycoupled, means involving a lever and link lever construction pivotallyconnected to the separate jaw parts for moving said parts intopredetermined position, and said lever and link lever being adjustablycoupled together to compensate for the adjustmentof the jaw parts withrelation to each other by said member.

3. A clamp of the class described comprising two jaw' parts,meanscoupled with the central portion of one jaw part and with which thecentral portion of the other jaw part is adjustably and pivotallymounted, a lever pivotally'mounted to the free end of the first namedjaw part, a link lever. pivotally mounted to the corresponding end ofthe other jaw part, and means for adjustably coupling said link leverand first named .ilever.

4. A clamp of the class described comprising two jaw parts, meanscoupled with the central portion of one jaw part and with which thecentral portion of the otherjaw part is adjustably and pivotallymounted, a lever pivotally mounted to the free end of the first namedjaw part, a link lever pivotally mounted to the corresponding end of theother jaw part, means for adjustably coupling said link lever and firstnamed lever, and means for retaining the lever and link lever inoperative position when the clamp is in use.

5. A clamp of the class described comprising two jaw parts, meanscoupled with the central portion of 'one jaw part and with which thecentral portion of the other jaw part is adjustably and pivotallymounted, a lever pivotally mounted to the free end of the first namedjaw part, a link lever pivotally mounted to the corresponding end of theother jaw part, means for adjustably coupling said link lever and firstnamed lever, means for retaining the lever and link lever in operativeposition when the clamp is in use, and the adjustable coupling of thelever and linkvlever being produced by an aperturev inone of said parts,andhaving notches to receive the pin on the other part.

6. A clamp of the class described comprising two jaw parts, a leverpivotally mounted to the free end of one of said jaw parts, a link leverpivotally mounted to the corresponding end of the other jaw part, meansfor adjustably coupling said link lever and first named lever, and meanson said jaw parts adjacent said levers and independent thereof foradjustably coupling said jaw parts.

7. A clamp of the class described comprising two jaw parts, a leverpivot-ally mounted to the free end of one of said jaw parts, a linklever pivotally mounted to the corresponding end of the other jaw part,

means for adjustably coupling said link lever and first named lever,means on said jaw parts adjacent said levers and independent thereof foradjustably coupling said jaw'parts, and one of said jaw parts beingpivoted in connection with said last named In testimony that I claim theforegoing as my invention I have signed my name this 28th day ofJanuary, 1926.

RICHARD MURRAY.

